WorksheetsElements, Compounds, and Mixtures
Total questions: 39
Worksheet time: 39mins
Four liquids are shown here. ________________ is the only COMPOUND illustrated.
Salt Water
Orange Juice
Milk
Pure Water
The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds?
aluminum and iron
iron and sodium chloride
carbon dioxide and aluminum
sodium chloride and carbon dioxide
Water is formed when two hydrogen atoms bond to an oxygen atom.
When a substance is made of two or more atoms like this, we call it a _________
mixture
compound
complex
element
- Pure Aluminum foil
- distilled water
- NaCl (table salt)
- Gold Bar (pure Au)
All of these may be classified as:
elements
compounds
pure substances
mixtures
Ice cream in a bowl with whipped cream and sprinkles is BEST described as:
mixture
element
compound
substance
Which of these is not considered a pure substance?
an atom
a mixture
an element
a compound
An unknown substance is provided in a science class. Looking at the substance, a student observes different colors and different sizes of particles unevenly distributed throughout the substance. What type of matter BEST classifies this substance?
Heterogeneous Mixture
Homogeneous Mixture
Element
Compound
Summarize the Venn diagram.
Compounds are found inside the matter of atoms.
A pure substance may contain subatomic particles but not atoms.
Compounds are the most basic form of matter. They combine to form larger atoms.
Atoms are the most basic form of matter. They combine to form larger compounds.
Elaborate on whether this structure represents an element or a compound.
This element is made up of multiple atoms.
It is an allotrope representing chloric acid.
The compound is made up of two different atoms: hydrogen and chlorine.
Elaborate the difference between NO and No.
NO and No represent neither a compound, a molecule, nor an element. Both are not possible.
NO represents the molecule nitrogen monoxide while No represents the molecule sodium oxide.
NO is the molecule nitrogen monoxide while No is the atomic symbol for the element nobelium.
NO and No both symbolize the molecule nitrogen monoxide - the capitalization doesn't matter.
Water is formed when two hydrogen atoms bond to an oxygen atom.
The hydrogen and the oxygen in this example are different
complexes
compounds
elements
mixtures
Interactions between different substances can result in the formation of new substances. Two such interactions are shown here.
Sodium + Chlorine → Common salt (sodium chloride)
Common salt + Water → Salt water
Which correctly classifies the products formed by the interactions shown?
Sodium chloride: Compound
Salt Water: Compound
Sodium chloride: Compound
Salt Water: Mixture
Sodium chloride: Mixture
Salt Water: Compound
Sodium chloride: Mixture
Salt Water: Mixture
Li(OH)2 is:
an element
a compound
H2O is:
an element
a compound
Li is:
an element
a compound
MgCl2 is:
an element
a compound
U is:
an element
a compound
H2SO4 is:
an element
a compound
CO is:
an element
a compound
Ca is:
an element
a compound
A represents:
an element
a compound
a molecule
B represents:
an element
a compound
a molecule
C represents
an element
a compound
a molecule
Compounds are formed when two or more ________________________ are chemically combined.
elements
properties
compounds
When elements are _______________ combined, a new substance is formed with new chemical and physical __________________________ .
physically; chemicals
chemically; properties
physically; properties
chemically; chemicals
C6H12O6 is:
an element
a compound
NaCl is:
an element
a compound
O is:
an element
a compound
Pb is:
an element
a compound
Elements are composed of
many types of atom
the same type of atom
many types of molecule
one type of molecule
Pure Aluminum foil;
distilled water;
NaCl (table salt);
Gold Bar (pure Au)
All of these may be classified as
elements
compounds
pure substances
mixtures
Which image(s) would be considered pure substances?
I
I and II
III and V
IV
In the classification of matter chart, letter B. would be a(n):
element
compound
mixture
solution
Which of these is not considered a pure substance?
atom
element
compound
mixture
Some common substances used in the laboratory are listed in the table. The chemical formulas of the substances are also listed beside their names. How many of the listed items are elements?
3
4
5
6
In the classification of matter, how would we classify air?
pure mixture
pure substance
homogenous mixture
heterogenous mixture
Sherry combined water, lemon juice, and sugar in a pitcher. Sherry has made a
compound
homogenous mixture
compound
heterogenous mixture
One difference between mixtures and pure substances is that
mixtures can be physically separated.
mixtures are made of one type of atom.
pure substances have no chemical bonds.
pure substances can be physically separated.
Terry sees an old rusty swing set at the park. He knows that rust is formed when iron (Fe) combines with oxygen (O) in the atmosphere to form iron oxide (FeO). How would you classify iron oxide?
compound
element
mixture
